US 11,997,717 B2
Random access method and apparatus, network device, and terminal
Shukun Wang, Dongguan (CN)
Assigned to GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD., Dongguan (CN)
Filed by GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD., Dongguan (CN)
Filed on Feb. 22, 2021, as Appl. No. 17/182,109.
Application 17/182,109 is a continuation of application No. PCT/CN2018/106941, filed on Sep. 21, 2018.
Prior Publication US 2021/0176781 A1, Jun. 10, 2021
Int. Cl. H04W 74/0833 (2024.01); H04W 74/00 (2009.01); H04W 80/02 (2009.01)
CPC H04W 74/0833 (2013.01) [H04W 74/004 (2013.01); H04W 74/006 (2013.01); H04W 80/02 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method for random access, comprising:
sending, by a network device, first configuration information corresponding to a preamble and second configuration information corresponding to a physical random access channel (PRACH) resource;
receiving, by the network device, MSG1, and determining a format of random access response (RAR) based on at least one of a preamble corresponding to the MSG1, a PRACH resource corresponding to the MSG1, or whether MSG3 is detected within a first time range; and
sending, by the network device, MSG2, based on the format of RAR,
wherein the first configuration information comprises a first set of preambles for a two-step random access procedure and a second set of preambles for a four-step random access procedure,
wherein the receiving, by the network device, the MSG1, and the determining the format of RAR based on the preamble corresponding to the MSG1 comprises:
receiving, by the network device, a first preamble and a second preamble on a same PRACH resource, wherein the first preamble belongs to the first set of preambles for the two-step random access procedure, and the second preamble belongs to the second set of preambles for the four-step random access procedure; and
determining, by the network device, that the first preamble corresponds to a first RAR format, and determining, by the network device, that the second preamble corresponds to a second RAR format, wherein the first RAR format is used for the two-step random access procedure, and the second RAR format is used for the four-step random access procedure.